Plumb the DragOperation through all the layers between the platform DnD code ...

webkit/glue/dragclient_impl.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "base/compiler_specific.h"
 
 MSVC_PUSH_WARNING_LEVEL(0);
 #include "ClipboardChromium.h"
@@ skipping 10 matching lines @@
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "webkit/api/public/WebDragData.h"
 #include "webkit/glue/context_menu.h"
 #include "webkit/glue/glue_util.h"
 #include "webkit/glue/webdropdata.h"
 #include "webkit/glue/webview_delegate.h"
 #include "webkit/glue/webview_impl.h"
 
 using WebKit::WebDragData;
+using WebKit::WebPoint;
 
 void DragClientImpl::willPerformDragDestinationAction(
     WebCore::DragDestinationAction,
     WebCore::DragData*) {
   // FIXME
 }
 
 void DragClientImpl::willPerformDragSourceAction(
     WebCore::DragSourceAction,
     const WebCore::IntPoint&,
@@ skipping 23 matching lines @@
                                const WebCore::IntPoint& event_pos,
                                WebCore::Clipboard* clipboard,
                                WebCore::Frame* frame,
                                bool is_link_drag) {
   // Add a ref to the frame just in case a load occurs mid-drag.
   RefPtr<WebCore::Frame> frame_protector = frame;
 
   WebDragData drag_data = webkit_glue::ChromiumDataObjectToWebDragData(
       static_cast<WebCore::ClipboardChromium*>(clipboard)->dataObject());
 
-  webview_->StartDragging(drag_data);
+  WebCore::DragOperation drag_operation_mask;
+  if (!clipboard->sourceOperation(drag_operation_mask)) {
+    drag_operation_mask = WebCore::DragOperationEvery;
+  }
+
+  webview_->StartDragging(webkit_glue::IntPointToWebPoint(event_pos),
+      drag_data,
+      static_cast<WebKit::WebDragOperationsMask>(drag_operation_mask));
 }
 
 WebCore::DragImageRef DragClientImpl::createDragImageForLink(
     WebCore::KURL&,
     const WebCore::String& label,
     WebCore::Frame*) {
   // FIXME
   return 0;
 }
 
 void DragClientImpl::dragControllerDestroyed() {
   delete this;
 }